package com.cet.qz.unit01.chapter1_1;

/**
 * @program: algorithm
 * @description:
 * @author: 陈恩涛
 * @create: 2020-12-09 21:48
 **/
public class Qz1_1_16 {

    public static String exR1(int n){
        if (n <= 0)
            return "";
        return exR1(n-3) + n + exR1(n-2) + n;

    }

    public static void main(String[] args) {
        System.out.println(exR1(6));
    }
}
